<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
	String path = request.getContextPath();
	String basePath = request.getScheme() + "://"
			+ request.getServerName() + ":" + request.getServerPort()
			+ path + "/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">

<title>My JSP 'a.jsp' starting page</title>

<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->

</head>

<body>
	<h1>EL表达式</h1>
	<%
		pageContext.setAttribute("xxx", "pageContext_XXX");
		request.setAttribute("xxx", "request_XXX");
		session.setAttribute("xxx", "session_XXX");
		application.setAttribute("xxx", "appliction_XXX");
	%>
	<%--全域查找，从小开始，没有输出空字符串，不是null --%>
	${xxx }
	<br />
	<%--指定域查找 --%>
	<br /> ${pageScope.xxx }
	<br /> ${requestScope.xxx }
	<br /> ${sessionScope.xxx }
	<br /> ${applicationScope.xxx }
	<br />
</body>
</html>
